.banner_bg{
    width: 100%;
    height: 300px;
    background-image: url(../images/Description.jpg);
}
.banner_t{
    width: 1180px;
    height: 396px;

}
.banner_t p{
    color: #666666;
    font-size:20px;
    /* text-indent: 40px; */
    line-height: 30px;
}
.banner_t .bor{
    width: 1180px;
    height: 50px;
}
#btnTop {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: none;
    background-color: #89cff0;
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 10px;
  }
  #btnTop:hover {
    background-color: #1E90FF;
  }